Yamaha PS-20 Automatic Bass Chord System

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• published: 10 Jul 2016
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Множество интересных, редких, винтажных инструментов вы можете найти по этим ссылкам: ВКонтакте: vk.com/musicnectar Facebook: facebook.com/Musicnectar-862249460557628 Twitter: https://twitter.com/MusicNectaRU?lang=ru E-mail: musicnectar@gmail.com 49 fullsize built-in speaker 10 note polyphony (only 4 notes with accompaniment) 4 note polyphonic chords monophonic solo voice 10 semi- OBS preset orchestra sounds {organ 1, trumpet, clarinet, piano, accordion | organ 2, string, oboe, harpsichord, vibraphone} selected by 5 OBS buttons + bank switch button 8 semi- OBS preset solo sounds {violin, trumpet, trombone, piccolo | saxophone, guitar 1, guitar 2, funny} selected by 4 OBS buttons + bank switch button 8 semi- OBS preset rhythms {march, waltz, tango, rhumba | disco, rock, swing, samba} selected by 4 OBS buttons + bank switch button locking multi- contact push button switches to select sounds and rhythms sustain switch fingered & single finger chord "chord memory" switch (means simply that chord is held when releasing keys) 2 bass variations ("multi bass") 2 arpeggio variations rhythm "8 bar variation" switch (inserts a fill-in every 8th bar) tempo slider separate rhythm, chord, arpeggio and solo volume sliders All main voice timbres seem to be made from a mixture of multiple analogue filtered squarewaves with a common digital envelope. analogue percussion {base, snare, hihat, low & high tabla(?)} sounds rather unspectacular, although possibly more realistic than many other analogue percussions. The hihat is likely mixed from 2 digital shift register feedback noise outputs at the CPU. The base is a dull popping noise. CPU "Yamaha YM1011, 16 2056" (40 pin DIL) + separate sound chip "Yamaha YM1101 E, 16 1853" (40 pin DIL). solo voice CPU(?) "Yamaha YM1102 F, 1Z 2258" (24 pin DIL) + sound chip(?) "Yamaha YM-1002, 1Y 20 28" (16 pin DIL) + filter IC "1G02611, 112 400" (14 pin DIL) solo voice tuning trimmer jacks for AC adapter, headphone, cinch sound input(!) & output and "expression" volume pedal internal power supply module that plugs into the battery compartment